CN114825580A - Gas station's monitor platform power protection device - Google Patents

Abstract

The invention relates to a power supply protection device of a gas station monitoring platform, which is provided with a signal acquisition unit, a signal amplification unit, a main control unit and a communication module; the signal acquisition unit is equipped with the input and is connected with nozzle status signal output and gather nozzle status signal in real time to divide into two the nozzle status signal: one path of signal is connected with the oiling machine mainboard to provide a signal which is acquired in real time and is of the same type as a refueling gun state signal sent by a refueling gun for the oiling machine mainboard, so that the existing oiling machine is not required to be changed, and the adaptability is strong; meanwhile, after the other path of signal is input to the signal amplification unit, the state signal of the oil gun is converted into a level signal to be input to the main control unit, so that interference is eliminated, and reliability is improved.

Description

A power protection device for monitoring platform of gas station

technical field

The invention relates to the technical field of oil and gas recovery monitoring in gas stations, in particular to a power protection device for a monitoring platform of gas stations.

Background technique

The monitoring system includes on-site sensors, acquisition controllers, and in-station monitoring platforms (hereinafter referred to as monitoring platforms). The monitoring platform includes general industrial computers and software systems, and has functions such as display, storage, and transmission for various parameters, tables or graphics of the operating status of the oil and gas recovery system, and finally realizes real-time or regular data upload operations to the information center.

Usually, the monitoring platform relies on the mains to work normally. The monitoring platform host (hereinafter referred to as the platform host) needs to receive, store, and transmit the refueling data of the refueling gun and the gas-liquid ratio, pressure, concentration and other environmental data in real time, and at the same time, it needs to upload the relevant information to the information center. However, objective factors such as unstable regional power grids or direct power outages when the platform host is not shut down can easily cause the platform host to fail to store and transmit relevant data in time, and it is also very likely to cause damage to the corresponding chips of the platform host, and even burn it in severe cases. Platform host, resulting in permanent loss of gas station-related data and information, resulting in immeasurable losses. In order to avoid the above problems, a power protection device for a monitoring platform of a gas station is required.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a power supply protection device for a gas station monitoring platform that can avoid the gas station monitoring platform in order to overcome the deficiencies of the prior art.

In order to achieve the above purpose, the present invention discloses a power supply protection device for a monitoring platform of a gas station, which is characterized by comprising a main control module, an uninterrupted power supply module, a line management and control module, a communication module and a backup power supply; the communication module is connected to the Between the main control module and the host platform, it is used for the transmission of information and instructions between the main control module and the platform host; the power supply uninterruptible module is connected to the common power supply and the backup power supply, when there is no input from the common power supply and the backup power supply , the power uninterruptible module has no working power output, and when either of the common power supply and the backup power supply has input, the power uninterruptible module has a working power output; the line management and control module is connected to the power uninterruptible module. Between the output end and the main power output end, the main power output end is used as the power output end of the host platform; the output end of the main control module is connected to the line management and control module, and the main control module includes a power monitoring unit, a power state A timing unit and a power supply status data processing unit, the power monitoring unit monitors the status of the common power supply and the standby power supply in real time, and sends the monitoring data to the power supply status data processing unit, and the power supply status data processing unit monitors the power supply according to the power supply. The common power supply and standby power state data input by the unit and the timing duration data of the power state timing unit, output a control signal to the line management and control module, and control the common power supply and standby power supply and the main power output. And then control the working power of the host platform.

As a further arrangement of the present invention, the power supply protection device further includes an alarm unit, and the power supply monitoring unit further includes a backup power supply undervoltage monitoring unit,

As a further arrangement of the present invention, the power uninterruptible module is composed of a power processing integrated circuit and its peripheral components, the power processing integrated circuit has two sets of power input terminals and a set of power output terminals, the common power supply and the backup power supply are respectively It is connected to two sets of power input terminals of the power processing integrated circuit, and the power output terminal of the power processing integrated circuit is connected to the main power output terminal.

As a further arrangement of the present invention, the communication module is composed of a serial communication integrated circuit and its peripheral components.

As a further arrangement of the present invention, the main control module is composed of a data processing system with a single-chip microcomputer as the core and its peripheral components; the line control module includes a control relay with two sets of one normally open switch and one normally closed switch and a control relay driven by The triode is the driving unit composed of the core. The two common contacts in the two groups of one normally open switch and one normally closed switch are connected to the output end of the power uninterruptible module, and the two groups are normally open and normally closed. Two normally open contacts in the switch are connected with the main power output terminal, and one normally closed contact in the two groups of one normally open and one normally closed switch is connected to the input terminal of the power monitoring unit in the main control module connection, the control output end of the power state data processing unit is connected with the drive end of the drive unit.

As a further arrangement of the present invention, the power supply monitoring unit, the power supply state timing unit and the power supply state data processing unit in the main control module are composed of a data processing system composed of the same single-chip microcomputer as the core and its peripheral components; the control relay is a magnetic latch relay.

Compared with the prior art, the power protection device for the monitoring platform of the gas station of the present invention is provided with modules such as a main control module, an uninterrupted power supply module, a line management and control module, a communication module, and a backup power supply, which can monitor the status of the common power supply and the backup power supply in real time and ensure that the Control the power supply line on and off, so that when the common power supply fails, the backup power supply is automatically connected, and the power protection device cuts off the power supply line after notifying and waiting for the normal shutdown of the platform host; when the common power supply is restored, the power supply protection device automatically closes the power supply After the line is connected, the platform host automatically starts up. Therefore, the monitoring platform will not be unable to store, transmit data or even burn due to power failure, and then accurately and reliably realize the automatic protection function of the monitoring platform's self-shutdown and power-on self-starting.

The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

Description of drawings

1 is a schematic block diagram 1 of a specific embodiment of the present invention;

FIG. 2 is a circuit schematic diagram of a specific embodiment of the main control module of the present invention;

3 is a circuit schematic diagram of a specific embodiment of the power supply uninterruptible module of the present invention;

FIG. 4 is a schematic appearance diagram of a specific embodiment of a line management and control module of the present invention;

FIG. 5 is a circuit schematic diagram of a specific embodiment of the communication module of the present invention;

6 is a circuit schematic diagram of a specific embodiment of the internal power supply unit of the present invention;

FIG. 7 is a schematic circuit diagram of a specific embodiment of the present invention;

8 is a block diagram of a control flow of a specific embodiment of the present invention;

FIG. 9 is a second principle block diagram of a specific embodiment of the present invention.

Detailed ways

As shown in Figure 1, the power supply protection device for the monitoring platform of the gas station of the present invention includes a main control module, an uninterrupted power supply module, a line management and control module, a communication module, a backup power supply, and an internal power supply unit that provides working power for the internal circuit of the protection device; The communication module is connected between the main control module and the host platform, and is used for the transmission of information and instructions between the main control module and the platform host. Select a mature communication integrated circuit, such as a serial communication integrated circuit; the power uninterruptible module is connected to the common power supply and the backup power supply. The power uninterruptible module has no working power output. When any of the common power supply and the backup power supply has input, the power uninterruptible module has a working power output. The working power here is controlled by the line control module and then output as a platform The working power supply of the host; the line management and control module is connected between the output end of the power uninterruptible module and the output end of the main power supply, and the output of the main power supply is used as the power output of the host platform through the output end of the main power supply; the output of the main control module The main control module includes a power supply monitoring unit, a power supply state timing unit and a power supply state data processing unit. The power supply monitoring unit monitors the status of the common power supply and the standby power supply in real time, and sends the monitoring data to In the power supply state data processing unit, the power supply state data processing unit outputs a control signal to the line management and control module according to the common power supply and standby power supply state data input by the power supply monitoring unit and the timing duration data of the power supply state timing unit , to control the disconnection or connection between the common power supply and the backup power supply and the main power supply output terminal, and then control the working power supply of the host platform. The power monitoring unit, power state timing unit and power state data processing unit may be independent circuit units, or a micro data processing chip such as a single-chip microcomputer and its peripheral components may be selected to form an integrated circuit unit.

In order to make those skilled in the art better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the preferred embodiments of the present application and the accompanying drawings. Obviously, the described embodiments are only The embodiments are part of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the scope of protection of the present application.

In this specific embodiment, the gas station monitoring platform power protection device also includes a main control module, an uninterrupted power supply module, a line management and control module, a communication module and a backup power supply.

In order to improve the reliability of the system, reduce the volume, and facilitate maintenance, as shown in FIG. 7 , in this specific embodiment, the power supply monitoring unit, the power supply state timing unit and the power supply state data processing unit in the main control module are composed of a single-chip microcomputer U5. The core, its internal programs, and peripheral components such as memory U4 are composed of a data processing system; according to data input and output signals and the requirements for internal timers, in this specific embodiment, the single-chip microcomputer U5 selects a micro processing chip with a model of STM32L151, and the memory U4 The selected model is AT24C02.

The communication module is composed of a dedicated communication integrated chip U6 and its peripheral components, as shown in FIG. 5 , in this specific embodiment, a 485 communication chip can be selected to obtain more reliable transmission characteristics. In the main control module, the pins PA10\PA11 of the single-chip microcomputer U5 are used as communication ports to connect with the dedicated communication integrated chip U6. The serial output end of the dedicated communication integrated chip U6 is output through a plug connector J1, and is connected to the platform host. Carry out the transmission of information and instructions; the PA1\PA2 pins of the single-chip microcomputer U5 in the main control module are respectively used as the standby power supply status monitoring terminal and the common power supply status monitoring terminal of the power supply status data processing unit.

The function of the power supply uninterruptible module is that when there is no input from the normal power supply and the backup power supply, the power supply uninterruptible module has no working power output. The module has a working power output, and the working power here is controlled by the line management and control module and then output as the working power of the platform host. There are many kinds of specific circuits that meet the above functions, such as circuits that are similar to the relationship between the power supply or the power supply. The circuit can be composed of discrete components or integrated circuits. As shown in FIG. 3 , in this specific embodiment, the power uninterruptible module is composed of a power processing integrated circuit U1 and its peripheral components. The power processing integrated circuit U1 selects commercially available products, such as those produced by Xi’an Huatai Semiconductor Technology Co., Ltd. The model is HTL6023 power processing integrated circuit. The power processing integrated circuit has two sets of power input terminals and a set of power output terminals. The common power supply and the backup power supply are respectively connected to the two sets of power input terminals of the power processing integrated circuit. The power supply output terminal of the power processing integrated circuit is connected to the main power output terminal plug P3 through the line control module, and the positive poles of the common power supply and the backup power supply pass through the first current limiting resistor R1 and the second current limiting resistor respectively. R2 is respectively connected with the PA2\PA1 pins of the common power supply state monitoring terminal and the standby power supply state monitoring terminal in the single-chip microcomputer U5 in the main control module as the power supply state data processing unit.

As shown in FIG. 9 , in order to avoid the situation that the backup power supply voltage is too low and the device cannot operate normally, an undervoltage monitoring unit is preferably provided. The power supply monitoring unit further includes an undervoltage monitoring unit, and the undervoltage monitoring unit monitors the backup power supply in real time. The power supply is under voltage state, and the monitoring data is sent to the power supply state data processing unit. The alarm unit outputs an alarm signal to the communication module according to the data processed by the power supply state data processing unit, and then alarms on the host platform. hint. The under-voltage monitoring unit circuit may be composed of discrete components, or may be composed of integrated circuits. In this specific embodiment, the HTL6023 power supply processing integrated circuit integrated with the undervoltage monitoring unit is selected, which can further simplify the circuit structure.

The line management and control module is connected between the output end of the power supply uninterruptible module and the plug connector P3 of the main power supply output end, and the power supply monitoring unit monitors the status of the common power supply and the backup power supply in real time, and sends the monitoring data to the power supply status In the data processing unit, the power state data processing unit outputs a control signal to the line control module according to the common power supply and standby power state data input by the power monitoring unit and the timing duration data of the power state timing unit to control the The disconnection or connection between the common power supply and the standby power supply and the main power output terminal, and then control the working power supply of the host platform.

The line management and control module includes a control relay with two sets of one normally open switch and one normally closed switch and a drive unit composed of a driving transistor as the core, and two common contacts in the two sets of one normally open switch and one normally closed switch. connected with the output end of the power supply uninterruptible module, the two normally open contacts in the two groups of one normally open and one normally closed switch are connected to the output end of the main power supply, the two groups of one normally open and one normally closed switch are connected to the output terminal of the main power supply. A normally closed contact in the normally closed switch is connected to the input end of the power monitoring unit in the main control module, and the control output end of the power state data processing unit is connected to the drive end of the drive unit to control the action of the control relay . As shown in FIG. 4 , in this specific embodiment, the control relay K1 of the two groups of control relays with one normally open switch and one normally closed switch is preferably a magnetic latching relay, and the driving transistor selects two NPN transistors, which are respectively The first driving transistor Q1 and the second driving transistor Q2; the base of the first driving transistor Q1 is connected to the ground of the power supply, and the first coil of the magnetic latching relay is connected between the positive pole of the power supply and the collector of the first driving transistor Q1. time; the base of the second driving transistor Q2 is connected to the ground of the power supply, the second coil of the magnetic latching relay is connected between the positive pole of the power supply and the collector of the second driving transistor Q2, and the single-chip microcomputer U5 in the main control module The No. PA4\PA5 pins are respectively used as the first control output terminal K_ON and the second control output terminal K_OFF of the power state data processing unit. The second control output terminal is connected to the second driving transistor Q2 through the second voltage dividing branch composed of the resistor R11 and the resistor R12. The base connection constitutes the second drive unit.

The working principle of the line control module is as follows:

When the common power supply is normally powered on, the single-chip microcomputer U5 pin K_ON outputs a high-level signal (powering on the platform host), and the high-level signal acts on the base of the transistor Q1 after passing through the resistor R9 (NPN transistor characteristics: high on the base level, the collector and the emitter are turned on), so that the collector and the emitter of the transistor Q1 are turned on, and the two ends of the pins 2 and 9 of the control relay K1 are respectively connected to the power supply +12V and the power supply ground, that is, the two ends of the coil form a In the electrical circuit, the relay controls the state switching of the two groups of one normally open and one normally closed switch of the relay K1, and maintains the current state: pin 4 is connected to pin 5, and pin 7 and pin 8 are connected (power-off condition) down, pin 4 is connected to pin 3, pin 7 is connected to pin 6), at this time, the power supply Vcc acts on the interface through the control relay K1 pin 4, pin 5 or pin 7 and pin 8 P3, which is to supply power to the platform host. At this time, the single-chip microcomputer U5 pin S_JDQ passes through the control relay K1 pin 3 and pin 4, and does not receive a high-level signal, and it is judged that the line control module is in the state of connecting the power supply line of the platform host.

When the common power supply continues to be powered off for a period of time, the single-chip microcomputer U5 pin K_OFF outputs a high-level signal. After the high level passes through the resistor R11, it acts on the base of the transistor Q2, so that the collector and the emitter of the transistor Q2 are turned on, and the control The two ends of the pins 1 and 10 of the relay K1 are respectively connected to the power supply +12V and the power supply ground, that is, an electrical circuit is formed at both ends of the coil. Status: Pin 4 is connected to pin 3, and pin 7 is connected to pin 6. At this time, the control relay K1 pin 4, pin 5 or pin 7 and pin 8 are all disconnected, and the power supply Vcc cannot act on the interface P3, that is, the platform host is powered off. At this time, the pin S_JDQ of the microcontroller U5 receives a high level signal through the pin 3 and pin 4 of the control relay K1, and it is judged that the line control module is in the state of disconnecting the power supply line of the platform host.

The power supply protection device further includes an alarm unit, and the power supply monitoring unit further includes a backup power supply undervoltage monitoring unit.

The control of the power state data processing unit is realized by an internal program, as shown in FIG. 8 , in this specific embodiment, the monitoring platform uses the commercial power as a common power supply to work normally, and the power monitoring unit of the power protection device will monitor the common power supply in real time. Power status and standby power status, supplying power to this unit and the platform host of the monitoring platform. When the backup power supply is under voltage, the monitoring platform has an alarm function.

When the common power supply is abnormally disconnected, the power monitoring unit immediately starts the backup power supply to ensure the uninterrupted power supply of the power protection device and the platform host.

When the normal power supply is abnormal for a period of time (for example, the power outage lasts for 10 seconds), the power protection device sends a shutdown command to the software system of the platform host of the monitoring platform, and the platform host performs the data storage work before shutdown.

After the platform host completes the normal shutdown and wait for a period of time (for example, execute the shutdown through the software and wait for 1 minute) to ensure that after the host completes the shutdown normally, the main control module of the power protection device controls the circuit control module to cut off the platform host and all power ( Including the power line between the regular power supply and the backup power supply).

In the process of completing the shutdown operation by command, whether the common power supply is restored or not will not change the shutdown operation of the platform host. After the shutdown operation is completed, the backup power supply only supplies power to the power protection device, and the power monitoring unit of the power protection device monitors in real time whether the common power supply is restored.

When the common power supply is restored and lasts for a period of time (for example, the power supply is restored and lasts for 10 seconds), the main control module of the power protection device controls the line management and control module, and closes the power supply line between the platform host and all power supplies (including the common power supply and backup power supply). , the platform host has the function of automatic power-on after power-on, and the platform host automatically starts after power-on.

The above-mentioned embodiments are only examples for clear description, and are not intended to limit the implementation manner. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. And the obvious changes or changes derived from this are still within the protection scope of the present invention.

Claims (9)

1. The utility model provides a filling station control platform power protection device which characterized in that: the intelligent power supply comprises a main control module, a power supply uninterrupted module, a circuit management and control module, a communication module and a standby power supply; the communication module is connected between the main control module and the host platform and is used for transmitting information and instructions between the main control module and the platform host; the power supply uninterrupted module is connected with a common power supply and a standby power supply, when the common power supply and the standby power supply are not input, the power supply uninterrupted module does not have working power supply output, and when any power supply of the common power supply and the standby power supply is input, the power supply uninterrupted module has working power supply output; the circuit management and control module is connected between the output end of the power supply uninterrupted module and the output end of a main power supply, and the output end of the main power supply is used as the power supply input end of the host platform; the output end of the main control module is connected with the circuit control module, the main control module outputs a control signal to the circuit control module to control the connection or disconnection between the common power supply and the main power supply output end and between the standby power supply and the main power supply output end, and further control the working power supply of the host platform.

2. A gasoline station monitoring platform power protection device as claimed in claim 1, characterized in that: the main control module comprises a power monitoring unit, a power state data processing unit and a power control unit, the power monitoring unit monitors the states of a common power supply and a standby power supply in real time and sends monitoring data to the power state data processing unit, and the power control unit outputs control signals to the circuit management and control module according to the data processed by the power state data processing unit and controls the common power supply and the standby power supply to be connected with a main power supply output end so as to control the working power supply of the host platform.

3. A gasoline station monitoring platform power protection device as claimed in claim 2, characterized in that: the main control module further comprises an alarm unit, the power supply monitoring unit further comprises an under-voltage monitoring unit, the under-voltage monitoring unit monitors the under-voltage state of the standby power supply in real time and sends monitoring data to the power supply state data processing unit, and the alarm unit outputs an alarm signal to the communication module according to the data processed by the power supply state data processing unit and then reports an alarm prompt on the host platform.

4. A gasoline station monitoring platform power protection device as claimed in claim 1, characterized in that: the power supply uninterrupted module is composed of a power supply processing integrated circuit and peripheral elements thereof, the power supply processing integrated circuit is provided with two groups of power supply input ends and a group of power supply output ends, the common power supply and the standby power supply are respectively connected with the two groups of power supply input ends of the power supply processing integrated circuit, and the power supply output end of the power supply processing integrated circuit is connected with the main power supply output end.

5. A gasoline station monitoring platform power protection device as claimed in any of claims 1-4, characterized in that: the communication module is composed of a serial communication integrated circuit and peripheral elements thereof.

6. A gasoline station monitoring platform power protection device as claimed in claim 5, characterized in that: the main control module is composed of a data processing system which takes a single chip microcomputer as a core and consists of peripheral elements.

7. A gasoline station monitoring platform power protection device as claimed in claim 6, characterized in that: the circuit management and control module is including having the control relay of two sets of one normally open, a normally closed switch and the drive unit who constitutes for the core by the drive triode, two common contacts in two sets of one normally open, a normally closed switch with the output of the incessant module of power is connected, two normally open contacts in two sets of one normally open, a normally closed switch with main power output end connects, one normally closed contact in two sets of one normally open, a normally closed switch with power monitoring unit input among the host system is connected, power control unit's control output and drive unit's drive end are connected.

8. A gasoline station monitoring platform power protection device as claimed in claim 7, wherein: the power monitoring unit and the power control and power state data processing unit in the main control module are composed of a data processing system which takes the same single chip microcomputer as a core and consists of peripheral elements thereof.

9. A gasoline station monitoring platform power protection device as claimed in claim 8, wherein: the control relay is a magnetic latching relay.

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